FLUE GAS CLEANING SYSTEM
A gas treatment system by means of a standard dry sorption system in accordance with EC regulation will be installed in our incineration plants.
The design of the flue gas cleaning system can vary according to the waste characteristic and the waste volume.
Each filter system will be adapted to the local requirements. Such systems can be composed of an additive dosing system, a bag filter system or a ceramic filter system and a draft fan.
The additive can be varied according to waste characteristics. Mostly sodium bicarbonate is indicated, with addition of activated carbon. This additive can be stored in big bags and can be feed by an air conveyor system. The sodium bicarbonate is an efficient reagent to remove SO2, HCl and HF. The activated carbon removes heavy metals and dioxin.
The products from the neutralization reaction are removed by a filter with bag filter or ceramic filter elements. The filter will be cleaned periodically through pressurized air impulses.
Of course, each system has its own limits. These are the maximum weight percent of the fuel for Chlorine <0.6 % wt, Sulphur: <0.3 % wt and Nitrogen: <0.9 % wt in order to comply with the European emission limit values by using the dry sorption system. (wt means weight percent). Therefore our plants are equipped with a bypass system for the connection of an additional flue gas scrubber. This ensures easy retrofitting. The advantage is obvious. We will protect you from unnecessary expenses if, for example, the waste composition is not clarified or its use changes.